九度1031

#include<iostream>using namespace std;int main(){int num;int times;while (true){cin >> num;if (num == 0){return 0;}times = 0;while (num != 1){if (num%2==0){num = num / 2;}else{num = (num * 3 + 1) / 2;}times++;}cout << times << endl;}return 0;}